More on pulsating B-type stars in the Magellanic Clouds

Diago, P. D.
Gutiérrez-Soto, J.
Fabregat, J.
Martayan, C.
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We present here the results of our research for B-type pulsators in low metallicity environments, searching for short-term periodic variability in a large sample of B and Be stars in the Magellanic Clouds (MC), for which the fundamental astrophysical parameters were accurately determined. A significant number of beta Cephei and SPB-like pulsators at low-metallicity have been detected, conflicting with the current theoretical models of pulsation. In addition, we have placed these pulsating stars in the HR diagram mapping the observational instability regions for the MC metallicities. The large sample of B and Be stars analysed allows 5Aus to make a reliable statistics of the pulsating B-type stars in the MC. Finally, we have made a comparison between pulsational theory and observations in low metallicity environments.
Comment: Contribution to the proceedings of the 38th LIAC/HELAS-ESTA/BAG, Liege (Belgium) July 2008. 6 pages
Astrophysics - Solar and Stellar Astrophysics